How to Grow Potatoes — Any Climate
How to grow potatoes anywhere in the world, without a calendar: wait for a soil temperature, not a date. Potatoes are cool-season, frost-tender foliage. Plant seed pieces once soil is workable and danger of hard frost has passed. Give them full sun, space them 25-30 cm (10-12 in) within row, 75-90 cm (30-36 in) between rows, and allow 70-90 days to maturity. These thresholds hold in any climate and either hemisphere.
When to plant potatoes — the conditions to wait for
There is no universal date for potatoes, because the same calendar month means completely different things at different latitudes and in opposite hemispheres. What does not change is the set of conditions the plant responds to.
| Condition | What this crop needs |
|---|---|
| Temperature class | Cool-season, frost-tender foliage |
| When conditions are right | Plant seed pieces once soil is workable and danger of hard frost has passed |
| Light | Full sun |
| Spacing | 25-30 cm (10-12 in) within row, 75-90 cm (30-36 in) between rows |
| Germination time | Sprouts from seed pieces in 2-3 weeks |
| Days to maturity | 70-90 days to maturity |
Observe, measure, decide
- Observe. Watch what your own garden does, not what a calendar says. When does standing water disappear in spring? Where does frost linger longest? Which corner warms first? A season of notes beats any regional average.
- Measure. Two instruments settle almost every timing question: a soil thermometer pushed 5-10cm (2-4in) into the bed at the same time each morning, and your own records of first and last frost. Soil temperature is the number that actually governs germination.
- Decide. Match the measurement to the crop's temperature class, then count backwards from your frost date using days-to-maturity. If the arithmetic does not fit your season, change the cultivar or the crop — not the date.
💡 The one instrument worth owning
A soil thermometer pushed 5-10 cm (2-4 in) into the bed, read at the same time each morning, answers more timing questions than any calendar. Soil temperature — not air temperature — governs whether seed germinates or rots.
Soil and site
Loose, well-drained soil, pH 5.5-6.5 — slightly acidic soil (down to pH 5.0-5.2) measurably suppresses common scab, though this acidic a soil suits few other vegetables, so it is a rotation decision more than a permanent one.
Watering
Even, consistent moisture, especially during tuber set; irregular watering causes hollow heart and knobby tubers.
Spacing and layout
Space potatoes 25-30 cm (10-12 in) within row, 75-90 cm (30-36 in) between rows. Crowding is the most common cause of disappointing yields — plants compete for light and water, and poor airflow between them raises disease pressure sharply.
Companion planting
Beans, peas, sweetcorn; avoid tomatoes and other Solanaceae nearby.
Common problems
Colorado potato beetle and late blight in humid climates. Hill soil around stems as they grow to prevent light exposure greening the tubers.
Turn growing potatoes into a written plan. The Global Vegetable Garden Planner (printable PDF) has the soil-temperature reference, crop rotation planner, sowing log and harvest tracker — 73 pages, no calendar required.
Frequently Asked Questions
When should I plant potatoes?
Wait for conditions rather than a date. Plant seed pieces once soil is workable and danger of hard frost has passed. This works identically in either hemisphere.
What temperature do potatoes need?
They are a cool-season, frost-tender foliage crop. Germination takes Sprouts from seed pieces in 2-3 weeks once conditions are right.
How far apart should potatoes be planted?
Space them 25-30 cm (10-12 in) within row, 75-90 cm (30-36 in) between rows.
What usually goes wrong with potatoes?
Colorado potato beetle and late blight in humid climates. Hill soil around stems as they grow to prevent light exposure greening the tubers.
Last updated 25 August 2026
Tools That Help With This Crop
Use these links when the guide moves from reading into sowing, planting, watering, and keeping the crop healthy.
Plan the next step
Use the printable SoilCommander planner for your region to turn this guide into sowing dates, bed layouts and weekly garden tasks.